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https://www.jobboard.com/_resx/storage/a03ded42-ie441/scripts/third-party/snowstorm/snowstorm3.js

js jobboard.com collected 2026-10-06 06:31:12 UTC 23,070 bytes, 689 lines download raw bytes

1/** @license
2 * DHTML Snowstorm! JavaScript-based snow for web pages
3 * Making it snow on the internets since 2003. You're welcome.
4 * -----------------------------------------------------------
5 * Version 1.44.20131208 (Previous rev: 1.44.20131125)
6 * Copyright (c) 2007, Scott Schiller. All rights reserved.
7 * Code provided under the BSD License
8 * http://schillmania.com/projects/snowstorm/license.txt
9 */
10
11/*jslint nomen: true, plusplus: true, sloppy: true, vars: true, white: true */
12/*global window, document, navigator, clearInterval, setInterval */
13
14var snowStorm = (function(window, document) {
15
16	Array.prototype.random = function () {
17	  return this[Math.floor((Math.random()*this.length))];
18	}
19
20  var snowflakeContainer = document.createElement('div');
21  snowflakeContainer.classList.add('snowflakeContainer');
22  document.body.appendChild(snowflakeContainer);
23
24  var isMobile = navigator.userAgent.match(/mobile|opera m(ob|in)/i);
25
26    var sty = document.createElement('style');
27    sty.innerHTML = ''+
28	'.snowflakeContainer { position:fixed; pointer-events:none; inset:0; overflow:hidden; z-index:1000; opacity:0.4; filter:saturate(0); }' +
29	'.snowflake { color:#8dc9ff; transform-origin:center; transition:opacity 0.5s; font-family:arial,verdana; font-weight:normal; padding:0px; margin:0px; text-align:center; vertical-align:baseline; } ' +
30	'.snowflake:nth-child(1n) { animation:spin1 4s linear infinite; } '+
31    '.snowflake:nth-child(2n) { animation:spin2 4s linear infinite; }' +
32	'.snowflake:nth-child(3n) { animation:spin1 8s linear infinite; } '+
33    '.snowflake:nth-child(4n) { animation:spin2 8s linear infinite; }' +
34	'@keyframes spin1 { 0% { transform:rotate(0deg); } 100% { transform:rotate(360deg); } }' +
35	'@keyframes spin2 { 0% { transform:rotate(0deg); } 100% { transform:rotate(-360deg); } }';
36    document.querySelector('body').appendChild(sty);
37
38  // --- common properties ---
39
40  this.autoStart = true;          // Whether the snow should start automatically or not.
41  this.excludeMobile = false;      // Snow is likely to be bad news for mobile phones' CPUs (and batteries.) Enable at your own risk.
42  this.flakesMax = isMobile ? 16 : 96;       // Limit total amount of snow made (falling + sticking)
43  this.flakesMaxActive = isMobile ? 8 : 32;  // Limit amount of snow falling at once (less = lower CPU use)
44  this.animationInterval = 33;    // Theoretical "miliseconds per frame" measurement. 20 = fast + smooth, but high CPU use. 50 = more conservative, but slower
45  this.useGPU = true;             // Enable transform-based hardware acceleration, reduce CPU load.
46  this.className = 'snowflake';          // CSS class name for further customization on snow elements
47  this.flakeBottom = window.innerHeight;        // Integer for Y axis snow limit, 0 or null for "full-screen" snow effect
48  this.followMouse = true;        // Snow movement can respond to the user's mouse
49  this.snowCharacters = [ '❄', '❅', '❆' ];
50  this.snowCharacter = '❄';  // • = bullet, · is square on some systems etc. ❅
51  this.snowStick = true;          // Whether or not snow should "stick" at the bottom. When off, will never collect.
52  this.targetElement = '.snowflakeContainer';      // element which snow will be appended to (null = document.body) - can be an element ID eg. 'myDiv', or a DOM node reference
53  this.useMeltEffect = false;      // When recycling fallen snow (or rarely, when falling), have it "melt" and fade out if browser supports it
54  this.useTwinkleEffect = false;  // Allow snow to randomly "flicker" in and out of view while falling
55  this.usePositionFixed = true;  // true = snow does not shift vertically when scrolling. May increase CPU load, disabled by default - if enabled, used only where supported
56  this.usePixelPosition = false;  // Whether to use pixel values for snow top/left vs. percentages. Auto-enabled if body is position:relative or targetElement is specified.
57
58  // --- less-used bits ---
59
60  this.freezeOnBlur = true;       // Only snow when the window is in focus (foreground.) Saves CPU.
61  this.flakeLeftOffset = 0;       // Left margin/gutter space on edge of container (eg. browser window.) Bump up these values if seeing horizontal scrollbars.
62  this.flakeRightOffset = 0;      // Right margin/gutter space on edge of container
63  this.flakeWidth = isMobile ? 10 : 25;            // Max pixel width reserved for snow element
64  this.flakeHeight = isMobile ? 10 : 25;           // Max pixel height reserved for snow element
65  
66  this.vMinX = 0.1;                 // Minimum X velocity range for snow (default 0.1)
67  this.vMaxX = 1;                 // Maximum X velocity range for snow
68  
69  this.vMinY = 0.5;                 // Minimum Y velocity range for snow (default 0.1)
70  this.vMaxY = 0.5;                 // Maximum Y velocity range for snow
71  
72  this.zIndex = 1000;                // CSS stacking order applied to each snowflake
73
74  // --- "No user-serviceable parts inside" past this point, yadda yadda ---
75
76  var storm = this,
77  features,
78  // UA sniffing and backCompat rendering mode checks for fixed position, etc.
79  isIE = navigator.userAgent.match(/msie/i),
80  isIE6 = navigator.userAgent.match(/msie 6/i),
81  isBackCompatIE = (isIE && document.compatMode === 'BackCompat'),
82  noFixed = (isBackCompatIE || isIE6),
83  screenX = null, screenX2 = null, screenY = null, scrollY = null, docHeight = null, vRndX = null, vRndY = null,
84  windOffset = 1,
85  windMultiplier = 2,
86  flakeTypes = 8,
87  fixedForEverything = false,
88  targetElementIsRelative = false,
89  opacitySupported = (function(){
90    try {
91      document.createElement('div').style.opacity = '0.5';
92    } catch(e) {
93      return false;
94    }
95    return true;
96  }()),
97  didInit = false,
98  docFrag = document.createDocumentFragment();
99
100  features = (function() {
101
102    var getAnimationFrame;
103
104    /**
105     * hat tip: paul irish
106     * http://paulirish.com/2011/requestanimationframe-for-smart-animating/
107     * https://gist.github.com/838785
108     */
109
110    function timeoutShim(callback) {
111      window.setTimeout(callback, 1000/(storm.animationInterval || 20));
112    }
113
114    var _animationFrame = (window.requestAnimationFrame ||
115        window.webkitRequestAnimationFrame ||
116        window.mozRequestAnimationFrame ||
117        window.oRequestAnimationFrame ||
118        window.msRequestAnimationFrame ||
119        timeoutShim);
120
121    // apply to window, avoid "illegal invocation" errors in Chrome
122    getAnimationFrame = _animationFrame ? function() {
123      return _animationFrame.apply(window, arguments);
124    } : null;
125
126    var testDiv;
127
128    testDiv = document.createElement('div');
129
130    function has(prop) {
131
132      // test for feature support
133      var result = testDiv.style[prop];
134      return (result !== undefined ? prop : null);
135
136    }
137
138    // note local scope.
139    var localFeatures = {
140
141      transform: {
142        ie:  has('-ms-transform'),
143        moz: has('MozTransform'),
144        opera: has('OTransform'),
145        webkit: has('webkitTransform'),
146        w3: has('transform'),
147        prop: null // the normalized property value
148      },
149
150      getAnimationFrame: getAnimationFrame
151
152    };
153
154    localFeatures.transform.prop = (
155      localFeatures.transform.w3 || 
156      localFeatures.transform.moz ||
157      localFeatures.transform.webkit ||
158      localFeatures.transform.ie ||
159      localFeatures.transform.opera
160    );
161
162    testDiv = null;
163
164    return localFeatures;
165
166  }());
167
168  this.timer = null;
169  this.flakes = [];
170  this.disabled = false;
171  this.active = false;
172  this.meltFrameCount = 20;
173  this.meltFrames = [];
174
175  this.setXY = function(o, x, y) {
176
177    if (!o) {
178      return false;
179    }
180
181    if (storm.usePixelPosition || targetElementIsRelative) {
182
183      o.style.left = (x - storm.flakeWidth) + 'px';
184      o.style.top = (y - storm.flakeHeight) + 'px';
185
186    } else if (noFixed) {
187
188      o.style.right = (100-(x/screenX*100)) + '%';
189      // avoid creating vertical scrollbars
190      o.style.top = (Math.min(y, docHeight-storm.flakeHeight)) + 'px';
191
192    } else {
193
194      if (!storm.flakeBottom) {
195
196        // if not using a fixed bottom coordinate...
197        o.style.right = (100-(x/screenX*100)) + '%';
198        o.style.bottom = (100-(y/screenY*100)) + '%';
199
200      } else {
201
202        // absolute top.
203        o.style.right = (100-(x/screenX*100)) + '%';
204        o.style.top = (Math.min(y, docHeight-storm.flakeHeight)) + 'px';
205
206      }
207
208    }
209
210  };
211
212  this.events = (function() {
213
214    var old = (!window.addEventListener && window.attachEvent), slice = Array.prototype.slice,
215    evt = {
216      add: (old?'attachEvent':'addEventListener'),
217      remove: (old?'detachEvent':'removeEventListener')
218    };
219
220    function getArgs(oArgs) {
221      var args = slice.call(oArgs), len = args.length;
222      if (old) {
223        args[1] = 'on' + args[1]; // prefix
224        if (len > 3) {
225          args.pop(); // no capture
226        }
227      } else if (len === 3) {
228        args.push(false);
229      }
230      return args;
231    }
232
233    function apply(args, sType) {
234      var element = args.shift(),
235          method = [evt[sType]];
236      if (old) {
237        element[method](args[0], args[1]);
238      } else {
239        element[method].apply(element, args);
240      }
241    }
242
243    function addEvent() {
244      apply(getArgs(arguments), 'add');
245    }
246
247    function removeEvent() {
248      apply(getArgs(arguments), 'remove');
249    }
250
251    return {
252      add: addEvent,
253      remove: removeEvent
254    };
255
256  }());
257
258  function rnd(n,min) {
259    if (isNaN(min)) {
260      min = 0;
261    }
262    return (Math.random()*n)+min;
263  }
264
265  function plusMinus(n) {
266    return (parseInt(rnd(2),10)===1?n*-1:n);
267  }
268
269  this.randomizeWind = function() {
270    var i;
271    vRndX = plusMinus(rnd(storm.vMaxX,0.8));
272    vRndY = rnd(storm.vMaxY,0.8);
273    if (this.flakes) {
274      for (i=0; i<this.flakes.length; i++) {
275        if (this.flakes[i].active) {
276          this.flakes[i].setVelocities();
277        }
278      }
279    }
280  };
281
282  this.scrollHandler = function() {
283    var i;
284    // "attach" snowflakes to bottom of window if no absolute bottom value was given
285    scrollY = (storm.flakeBottom ? 0 : parseInt(window.scrollY || document.documentElement.scrollTop || (noFixed ? document.body.scrollTop : 0), 10));
286    if (isNaN(scrollY)) {
287      scrollY = 0; // Netscape 6 scroll fix
288    }
289    if (!fixedForEverything && !storm.flakeBottom && storm.flakes) {
290      for (i=0; i<storm.flakes.length; i++) {
291        if (storm.flakes[i].active === 0) {
292          storm.flakes[i].stick();
293        }
294      }
295    }
296  };
297
298  this.resizeHandler = function() {
299    if (window.innerWidth || window.innerHeight) {
300      screenX = window.innerWidth - 16 - storm.flakeRightOffset;
301      screenY = (storm.flakeBottom || window.innerHeight);
302    } else {
303      screenX = (document.documentElement.clientWidth || document.body.clientWidth || document.body.scrollWidth) - (!isIE ? 8 : 0) - storm.flakeRightOffset;
304      screenY = storm.flakeBottom || document.documentElement.clientHeight || document.body.clientHeight || document.body.scrollHeight;
305    }
306    docHeight = document.body.offsetHeight;
307    screenX2 = parseInt(screenX/2,10);
308  };
309
310  this.resizeHandlerAlt = function() {
311    screenX = storm.targetElement.offsetWidth - storm.flakeRightOffset;
312    screenY = storm.flakeBottom || storm.targetElement.offsetHeight;
313    screenX2 = parseInt(screenX/2,10);
314    docHeight = document.body.offsetHeight;
315  };
316
317  this.freeze = function() {
318    // pause animation
319    if (!storm.disabled) {
320      storm.disabled = 1;
321    } else {
322      return false;
323    }
324    storm.timer = null;
325  };
326
327  this.resume = function() {
328    if (storm.disabled) {
329       storm.disabled = 0;
330    } else {
331      return false;
332    }
333    storm.timerInit();
334  };
335
336  this.toggleSnow = function() {
337    if (!storm.flakes.length) {
338      // first run
339      storm.start();
340    } else {
341      storm.active = !storm.active;
342      if (storm.active) {
343        storm.show();
344        storm.resume();
345      } else {
346        storm.stop();
347        storm.freeze();
348      }
349    }
350  };
351
352  this.stop = function() {
353    var i;
354    this.freeze();
355    for (i=0; i<this.flakes.length; i++) {
356      this.flakes[i].o.style.display = 'none';
357    }
358    storm.events.remove(window,'scroll',storm.scrollHandler);
359    storm.events.remove(window,'resize',storm.resizeHandler);
360    if (storm.freezeOnBlur) {
361      if (isIE) {
362        storm.events.remove(document,'focusout',storm.freeze);
363        storm.events.remove(document,'focusin',storm.resume);
364      } else {
365        storm.events.remove(window,'blur',storm.freeze);
366        storm.events.remove(window,'focus',storm.resume);
367      }
368    }
369  };
370
371  this.show = function() {
372    var i;
373    for (i=0; i<this.flakes.length; i++) {
374      this.flakes[i].o.style.display = 'block';
375    }
376  };
377
378  this.SnowFlake = function(type,x,y) {
379    var s = this;
380    this.type = type;
381    this.x = x||parseInt(rnd(screenX-20),10);
382    this.y = (!isNaN(y)?y:-rnd(screenY)-12);
383    this.vX = null;
384    this.vY = null;
385    this.vAmpTypes = [1.2,1.4,1.6,1.8]; // "amplification" for vX/vY (based on flake size/type)
386    this.vAmp = this.vAmpTypes[this.type] || 1;
387    this.melting = false;
388    this.meltFrameCount = storm.meltFrameCount;
389    this.meltFrames = storm.meltFrames;
390    this.meltFrame = 0;
391    this.twinkleFrame = 0;
392    this.active = 1;
393    this.fontSize = (15+(this.type/5)*20);
394    
395    this.o = document.createElement('div');
396	this.o.innerHTML = storm.snowCharacters.random();
397    //this.o.innerHTML = storm.snowCharacter;
398    if (storm.className) {
399      this.o.setAttribute('class', storm.className);
400    }
401    
402    this.o.style.position = (fixedForEverything?'fixed':'absolute');
403    if (storm.useGPU && features.transform.prop) {
404      // GPU-accelerated snow.
405      this.o.style[features.transform.prop] = 'translate3d(0px, 0px, 0px)';
406    }
407    this.o.style.width = storm.flakeWidth+'px';
408    this.o.style.height = storm.flakeHeight+'px';
409    this.o.style.zIndex = storm.zIndex;
410    docFrag.appendChild(this.o);
411
412    this.refresh = function() {
413      if (isNaN(s.x) || isNaN(s.y)) {
414        // safety check
415        return false;
416      }
417      storm.setXY(s.o, s.x, s.y);
418    };
419
420    this.stick = function() {
421      s.setOpacity(s.o,0);
422	  s.o.style.animationPlayState = 'paused';
423	  
424	  if (noFixed || (storm.targetElement !== document.documentElement && storm.targetElement !== document.body)) {
425        s.o.style.top = (screenY+scrollY-storm.flakeHeight)+'px';
426      } else if (storm.flakeBottom) {
427        s.o.style.top = storm.flakeBottom+'px';
428      } else {
429		//s.o.style.display = 'none';
430        s.o.style.bottom = '0%';
431        s.o.style.position = 'fixed';
432        s.o.style.display = 'block';
433      }
434    };
435
436    this.vCheck = function() {
437      if (s.vX>=0 && s.vX<0.2) {
438        s.vX = 0.2;
439      } else if (s.vX<0 && s.vX>-0.2) {
440        s.vX = -0.2;
441      }
442      if (s.vY>=0 && s.vY<0.2) {
443        s.vY = 0.2;
444      }
445    };
446
447    this.move = function() {
448      var vX = s.vX*windOffset, yDiff;
449      s.x += vX;
450      s.y += (s.vY*s.vAmp);
451      if (s.x >= screenX || screenX-s.x < storm.flakeWidth) { // X-axis scroll check
452        s.x = 0;
453      } else if (vX < 0 && s.x-storm.flakeLeftOffset < -storm.flakeWidth) {
454        s.x = screenX-storm.flakeWidth-1; // flakeWidth;
455      }
456      s.refresh();
457      yDiff = screenY+scrollY-s.y+storm.flakeHeight;
458      if (yDiff<storm.flakeHeight) {
459        s.active = 0;
460        if (storm.snowStick) {
461          s.stick();
462        } else {
463          s.recycle();
464        }
465      } else {
466        if (storm.useMeltEffect && s.active && s.type < 3 && !s.melting && Math.random()>0.998) {
467          // ~1/1000 chance of melting mid-air, with each frame
468          s.melting = true;
469          s.melt();
470          // only incrementally melt one frame
471          // s.melting = false;
472        }
473        if (storm.useTwinkleEffect) {
474          if (s.twinkleFrame < 0) {
475            if (Math.random() > 0.97) {
476              s.twinkleFrame = parseInt(Math.random() * 8, 10);
477            }
478          } else {
479            s.twinkleFrame--;
480            if (!opacitySupported) {
481              s.o.style.visibility = (s.twinkleFrame && s.twinkleFrame % 2 === 0 ? 'hidden' : 'visible');
482            } else {
483              s.o.style.opacity = (s.twinkleFrame && s.twinkleFrame % 2 === 0 ? 0 : 1);
484            }
485          }
486        }
487      }
488    };
489
490    this.animate = function() {
491      // main animation loop
492      // move, check status, die etc.
493      s.move();
494    };
495
496    this.setVelocities = function() {
497      s.vX = vRndX+rnd(storm.vMaxX*0.12,storm.vMinX);
498      s.vY = vRndY+rnd(storm.vMaxY*0.12,storm.vMinY);
499    };
500
501    this.setOpacity = function(o,opacity) {
502      if (!opacitySupported) {
503        return false;
504      }
505      o.style.opacity = opacity;
506    };
507
508    this.melt = function() {
509      if (!storm.useMeltEffect || !s.melting) {
510        s.recycle();
511      } else {
512        if (s.meltFrame < s.meltFrameCount) {
513          s.setOpacity(s.o,s.meltFrames[s.meltFrame]);
514          //s.o.style.fontSize = s.fontSize-(s.fontSize*(s.meltFrame/s.meltFrameCount))+'px';
515          //s.o.style.lineHeight = storm.flakeHeight+2+(storm.flakeHeight*0.75*(s.meltFrame/s.meltFrameCount))+'px';
516          s.meltFrame++;
517        } else {
518          s.recycle();
519        }
520      }
521    };
522
523    this.recycle = function() {
524      s.o.style.display = 'none';
525	  s.o.style.animationPlayState = 'running';
526      s.o.style.position = (fixedForEverything?'fixed':'absolute');
527      s.o.style.bottom = 'auto';
528      s.setVelocities();
529      s.vCheck();
530      s.meltFrame = 0;
531      s.melting = false;
532      s.setOpacity(s.o,1);
533      s.o.style.fontSize = s.fontSize+'px';
534      //s.o.style.lineHeight = (storm.flakeHeight+2)+'px';
535      s.x = parseInt(rnd(screenX-storm.flakeWidth-20),10);
536      s.y = parseInt(rnd(screenY)*-1,10)-storm.flakeHeight;
537      s.refresh();
538      s.o.style.display = 'block';
539      s.active = 1;
540    };
541
542    this.recycle(); // set up x/y coords etc.
543    this.refresh();
544
545  };
546
547  this.snow = function() {
548    var active = 0, flake = null, i, j;
549    for (i=0, j=storm.flakes.length; i<j; i++) {
550      if (storm.flakes[i].active === 1) {
551        storm.flakes[i].move();
552        active++;
553      }
554      if (storm.flakes[i].melting) {
555        storm.flakes[i].melt();
556      }
557    }
558    if (active<storm.flakesMaxActive) {
559      flake = storm.flakes[parseInt(rnd(storm.flakes.length),10)];
560      if (flake.active === 0) {
561        flake.melting = true;
562      }
563    }
564    if (storm.timer) {
565      features.getAnimationFrame(storm.snow);
566    }
567  };
568
569  this.mouseMove = function(e) {
570    if (!storm.followMouse) {
571      return true;
572    }
573    var x = parseInt(e.clientX,10);
574    if (x<screenX2) {
575      x -= screenX2;
576      windOffset = (x/screenX2)*windMultiplier;
577    } else {
578      windOffset = -windMultiplier+(x/screenX2*windMultiplier);
579    }
580  };
581
582  this.createSnow = function(limit,allowInactive) {
583    var i;
584    for (i=0; i<limit; i++) {
585      storm.flakes[storm.flakes.length] = new storm.SnowFlake(parseInt(rnd(flakeTypes),10));
586      if (allowInactive || i>storm.flakesMaxActive) {
587        storm.flakes[storm.flakes.length-1].active = -1;
588      }
589    }
590    storm.targetElement.appendChild(docFrag);
591  };
592
593  this.timerInit = function() {
594    storm.timer = true;
595    storm.snow();
596  };
597
598  this.init = function() {
599    var i;
600    for (i=0; i<storm.meltFrameCount; i++) {
601      storm.meltFrames.push(1-(i/storm.meltFrameCount));
602    }
603    storm.randomizeWind();
604    storm.createSnow(storm.flakesMax); // create initial batch
605    storm.events.add(window,'resize',storm.resizeHandler);
606    storm.events.add(window,'scroll',storm.scrollHandler);
607    if (storm.freezeOnBlur) {
608      if (isIE) {
609        storm.events.add(document,'focusout',storm.freeze);
610        storm.events.add(document,'focusin',storm.resume);
611      } else {
612        storm.events.add(window,'blur',storm.freeze);
613        storm.events.add(window,'focus',storm.resume);
614      }
615    }
616    storm.resizeHandler();
617    storm.scrollHandler();
618    if (storm.followMouse) {
619      storm.events.add(isIE?document:window,'mousemove',storm.mouseMove);
620    }
621    storm.animationInterval = Math.max(20,storm.animationInterval);
622    storm.timerInit();
623  };
624
625  this.start = function(bFromOnLoad) {
626    if (!didInit) {
627      didInit = true;
628    } else if (bFromOnLoad) {
629      // already loaded and running
630      return true;
631    }
632    if (typeof storm.targetElement === 'string') {
633      var targetID = storm.targetElement;
634      storm.targetElement = document.querySelector(targetID);
635      if (!storm.targetElement) {
636        throw new Error('Snowstorm: Unable to get targetElement "'+targetID+'"');
637      }
638    }
639    if (!storm.targetElement) {
640      storm.targetElement = (document.body || document.documentElement);
641    }
642    if (storm.targetElement !== document.documentElement && storm.targetElement !== document.body) {
643      // re-map handler to get element instead of screen dimensions
644      storm.resizeHandler = storm.resizeHandlerAlt;
645      //and force-enable pixel positioning
646      storm.usePixelPosition = true;
647    }
648    storm.resizeHandler(); // get bounding box elements
649    storm.usePositionFixed = (storm.usePositionFixed && !noFixed && !storm.flakeBottom); // whether or not position:fixed is to be used
650    if (window.getComputedStyle) {
651      // attempt to determine if body or user-specified snow parent element is relatlively-positioned.
652      try {
653        targetElementIsRelative = (window.getComputedStyle(storm.targetElement, null).getPropertyValue('position') === 'relative');
654      } catch(e) {
655        // oh well
656        targetElementIsRelative = false;
657      }
658    }
659    fixedForEverything = storm.usePositionFixed;
660    if (screenX && screenY && !storm.disabled) {
661      storm.init();
662      storm.active = true;
663    }
664  };
665
666  function doDelayedStart() {
667    window.setTimeout(function() {
668      storm.start(true);
669    }, 20);
670    // event cleanup
671    storm.events.remove(isIE?document:window,'mousemove',doDelayedStart);
672  }
673
674  function doStart() {
675    if (!storm.excludeMobile || !isMobile) {
676      doDelayedStart();
677    }
678    // event cleanup
679    storm.events.remove(window, 'load', doStart);
680  }
681
682  // hooks for starting the snow
683  if (storm.autoStart) {
684    storm.events.add(window, 'load', doStart, false);
685  }
686
687  return this;
688
689}(window, document));

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